Step 1: Review Mahavir's Timeline.
- Birth: 599 BCE.
- Enlightenment: Age 42.
- First Sermon: Post-Enlightenment.
- Death: 527 BCE.
Step 2: Chronological Ordering.
First: Birth (A).
Second: Enlightenment (C).
Third: First Sermon (B).
Fourth: Death (D).
Step 3: Confirm with Choices.
The sequence aligns with option (C) A, C, B, D.
Step 4: Final Answer.
The correct sequence is (C) A, C, B, D.